Drone Release Drafter

This drone plugin can be used to draft releases for a GitHub repository.

Plugin in action:

I, [2022-01-09T13:22:02.324389 #6]  INFO -- : Plugin configuration: {"changelog"=>{"categories"=>[{"labels"=>["new feature", "enhancement"], "title"=>"New Features"}, {"labels"=>["bugfix"], "title"=>"Bugfixes"}, {"labels"=>["dependencies"], "title"=>"Dependencies update"}, {"labels"=>["*"], "title"=>"Other Changes"}]}, "version_resolver"=>{"calver"=>{"format"=>"$YEAR.$MONTH-$MICRO", "month"=>"%m", "year"=>"%y"}}}
I, [2022-01-09T13:22:02.324428 #6]  INFO -- : Drafting release for main branch...
I, [2022-01-09T13:22:04.537364 #6]  INFO -- : Merged pull requests from release 22.01-1: ["Pull request 4", "Pull request 1", "Pull request 2", "Pull request 3"]
I, [2022-01-09T13:22:04.537612 #6]  INFO -- : New drafting tag name details:
Tag: 22.01-2
Body:
<!-- Release notes generated using Drone plugin -->

## What's Changed
### New Features
* Pull request 4 by @user1 in https://github.com/test/test/pull/4
* Pull request 2 by @user2 in https://github.com/test/test/pull/2
### Bugfixes
* Pull request 1 by @user1 in https://github.com/test/test/pull/1
### Dependencies update
* Pull request 3 by @user3 in https://github.com/test/test/pull/3


**Full Changelog**: https://github.com/test/test/compare/22.01-1...22.01-2

I, [2022-01-09T13:22:05.816372 #6]  INFO -- : Drafted release 22.01-2: https://github.com/test/test/releases/tag/untagged-0

Usage

In order to use this plugin in one your Drone steps you can use the following step definition:

steps:
  - name: draft
    image: uala/drone-release-drafter
    pull: if-not-exists
    environment:
      GITHUB_PUBLISH_TOKEN: ''
    settings:
      changelog:
        categories:
          - title: New Features
            labels:
              - new feature
              - enhancement
          - title: Bugfixes
            labels:
              - bugfix
          - title: Dependencies update
            labels:
              - dependencies
          - title: Other Changes
            labels:
              - "*"
      version_resolver:
        calver:
          year: '%y'
          month: '%m'
          format: '$YEAR.$MONTH-$MICRO'
      branches:
        - main
      enforce_head: true
      release_labels:
        - automatic release

Plugin image will read the given config and draft (create or update) a new release.

Please note that it's required for an existing release to be already present on the repository, in order to properly resolve the new changelog and version.

GitHub token

A GitHub OAuth token must be passed to the plugin through the GITHUB_PUBLISH_TOKEN environment variable. Due to the not-so-fine-grained GitHub permissions, given token must have read and write permissions to the whole repository.

Plugin settings

The plugin accepts the following settings:

• changelog: mandatory setting, contains release changelog settings as per GitHub release configuration
• dry_run: setting this value to any non empty string will enable plugin dry-run mode, i.e. commands will printed to screen but they won't be executed
• logging: logging level of plugin, default is info, supported values: any Ruby logger valid level
• version_resolver: object describing how to resolve next release tag/name
• branches: array of branches' names where the plugin should run, an empty field means all branches are enabled
• enforce_head: boolean any non empty string will be considered as true, will skip plugin logic if not on HEAD commit
• release_labels: array of labels that will trigger automatic release if all merged pulls contains at least one of the specified labels. Please note that Drone build must be succeding (DRONE_BUILD_STATUS=success).

Changelog

The changelog's categories order respect the defined order in configuration. As per Pull Request order inside a category, the merged_at field is used, sorting from the least recent merged to the most recent one.

Version resolver

The plugin is currently configurable for CalVer versioning, with year, month, day calendar variables (in ISO-8601 format) and micro versioning variable.

Accepted options are:

• year: year format
• month: month format
• day: day format
• format: tag/name string format composable with $YEAR, $MONTH, $DAY, $MICRO variables in the preferred format

For example, given the configuration above and the latest version named 21.10-4, this plugin will resolve new version tag/name as 21.10-5 while we are in Oct '21, 21.11-0 while we are in Nov '21 and 22.01-0 while we are in Jan '22.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/uala/drone-release-drafter

License

Drone Release Drafter is released under the MIT License.